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Re: port-xen/42441 (DOM0 and DOMU work with only one cpu)
The following reply was made to PR port-xen/42441; it has been noted by GNATS.
From: Manuel Bouyer <bouyer%antioche.eu.org@localhost>
To: Martin Husemann <martin%duskware.de@localhost>
Subject: Re: port-xen/42441 (DOM0 and DOMU work with only one cpu)
Date: Wed, 20 Jun 2018 13:13:58 +0200
On Wed, Jun 20, 2018 at 12:37:31PM +0200, Martin Husemann wrote:
> On Wed, Jun 20, 2018 at 12:23:23PM +0200, Manuel Bouyer wrote:
> > serveral dom0-only drivers (backends, some parts of xenbus) are not MP-safe.
> > Just grep for 'splx' here ...
> That does not tell me a lot without deeper code review and xen knowledge,
> I fear - or I am missing your point.
You're right, that's not enough. There is at last one place which
is not MP-safe and runs without the big lock (AFAIK), it is the
dom0-specific event code.
There may also be issues with the grant tables and xenbus, but I don't remmber
the details and I may be wrong.
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
NetBSD: 26 ans d'experience feront toujours la difference
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